If a 50-point switch closes while the spinner is still spinning, the game clears the scores and kicks out a new ball, sometimes jumping players or ball count.
Game resets when a target is hit while the spinner spins
Cause: On one relay, contacts that should be make-only had been gapped as make/break, feeding power into the reset circuit.
Checks
- Check the start button and coin switches are not partly closed.
- With the playfield up, reproduce the fault and watch which relay pulls in (start or reset).
- Inspect the switch stacks on the relays involved for contacts gapped differently from the schematic.
Fix
- Re-tension the mis-gapped contacts so they match the schematic (make-only where shown).
Turn the game off and unplug it before adjusting switches in the cabinet or backbox; EM games carry line voltage and the score motor can move unexpectedly.
Systems
Games
Related tips
- Wrong player comes up on ball 2 and scores won't reset: stuck P relay switch
- Players, credits or ball count not resetting points to a stepper unit
- Gottlieb multi-player: motor runs on at player 1 ball 1
- Ball count stays at 1 after each drain: dirty secondary trough switch
- Ball count drops by one as the first ball is served: stuck 10-point playfield switch
- Hitting targets runs the ball count to game over: shorted rollover switch
- Player 1 'up' lights stay off during play: clean the coin unit contacts
- 10-point reel keeps scoring after a mushroom hit: series relay coil stuck on
Source: Pinball Repair help group!! (Facebook group)